202 THE ENZYME
TREATMENT OF CANCER
Because
to do so would take up much space, I refrain from giving an account of the
Roberts methods and their results. Possibly in the interests of science—not
“medical science “—some of the medical journals may see fit to republish his
Royal Society paper. If not, one prominent consulting physician, who has made
still further investigations into these matters, may deem it expedient to
publish the memoir, which, I believe, he wrote down a few years ago. Briefly,
it may be stated that Roberts set up certain tryptic and amylolytic units, in
terms of which preparations or injections might be designated. Thus, of the
injections used in 1907, practically all those sold by two firms, the one in
London, the other in New York, had no greater tryptic strength than 500 Roberts
units, while as a rule their amylolytic activities were considerably under 500
units. Some of the injections had not more than 100 units of strength, and the
German injections were excessively weak in such units of tryptic strength and
possessed no amylolytic powers worth mentioning. Under the newer procedure it
has been found best to put up the two ferments, trypsin and amylopsin, in
separate ampoules, which I would suggest should be differently coloured. The
trypsin injection thus prepared should be as free as possible of amylopsin, and
the amylopsin injection should be to all intents free from trypsin. The ampoule
of 1 c.c. should contain in this bulk 1,000 units of tryptic activity, and the
ampoule of amylopsin should have per ampoule at least 2,000 units of amylolytic
activity. Personally, I do not believe that reliance can he placed upon
injections containing respec-
(cont. from p201) test,” and it depends upon the time
required by milk to reach the coagulation point. It is, in my experience, an
extremely delicate test, and free from the objections attaching to the” bitter
taste “ test employed in America.